Yes, you can install a 1x PCIe card into a 16x or 4x PCIe slot

I read that the Dell XPS 8300 came with a PCIe slot and three PCIe slots for any other cards you

x1, x2, x4, x8, x16 PCIe Gen 3 bandwidth, 1 GBs, 2 GBs, 4 GBs, 8 GBs, 16 GBs That means if you purchase a PCIe Gen 4 NVMe SSD today, you can use it

candy dreams slot A PCIe x1 slot has exactly one PCIe lane to use, and the same rule will generally apply moving up the ladder through x4, x8, and x16 slots Each available PCIe

cannon cove slot It should work just fine The port should automatically drop down to x4 You may need to get a smaller plate though